Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – Plural light emitting devices
Reexamination Certificate
2011-04-05
2011-04-05
Parker, Kenneth A (Department: 2815)
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
Plural light emitting devices
C257S040000, C257S079000, C257SE51001, C257SE51022
Reexamination Certificate
active
07919783
ABSTRACT:
An object is to provide a white light-emitting element which emits broad white light which is close to natural light and covers a wide wavelength range; that is, a white light-emitting element which has a broad spectrum waveform. Further, there are various different kinds of white light; however, in particular, an object is to provide a white light-emitting element which emits white light which is close to the standard white color of the NTSC. Over a substrate100, a second light-emitting element110and a first light-emitting element120are stacked in series. The first light-emitting element120exhibits a light emission spectrum having two peaks (two peaks in the blue to green wavelength range) and is disposed close to a film of light-reflecting material. The second light-emitting element110exhibits a light emission spectrum having a peak in the orange to red wavelength range, and is disposed in a position which is not close to the film of light-reflecting material.
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Aoyama Tomoya
Seo Satoshi
Sugisawa Nozomu
Ushikubo Takahiro
Ho Anthony
Husch & Blackwell LLP
Parker Kenneth A
Semiconductor Energy Laboratory Co,. Ltd.
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